Improvement in steam-boiler furnaces



UNITED STATES PATENT OFFICE.

HosEA E. HUNTLEY, on QUINGY, ILLINOIS.

IMPROVEMEN'l IN STEAMeBOILER FURNACES.

Specification forming part of Letters PatentlNo. 52,841, dated October 6, 1868.

To all whom t may concern:

Be it known that I, HosEA H. HUN'rLEY, of Quincy, in the county of Adams and State of Illinois, have invented a new and valuable Improvement in Furnaces; and I do hereby declare that the following is a full, clear, and

exact description of the construction and operation ot' the same, reference being had to the annexed drawings, making a part of this specication, and to the letters and gures of reference marked thereon.

The nature of my invention consists in constructin g a furnace in such form and manner as to admit heated4 air to the re, thereby greatly intensifying the heat and consuming the smoke by lrst changing said air and smoke into inflammable gas.

The letters A ofthe drawings represent the {ire-places, separated by the air-chamber B.

Letters G are grate bars below the tire. These bars are made in a tubular form, with liattened upper surfaces.

Letters D are small apertures in the front end of the furnace, through which cold air passes into the gratebars. Similar apertures in the plate at the rear end of the grate-bars admit the air from the bars to the conical chamber E. These last-named apertures are marked F.

Letter Gis an air-passage leading into the air-chamber B. rfhis air-chamber is divided by aplate, a,which separates it into an upper v and lower chamber. The plate a extends from the rear of said chamber to Within about two inches (more or less) of the front thereof.

The upper compartment of chamber B is perforated with holes in its sides to allow the air, when heated therein, to pass to the lire.

The letters H are air-chambers on each side of the lire-place, and they also are perforated on their sides next the lire to provide for the passage thereto of heated air; There are also similar air-passages from the surface of the conical chamber E. f

' Letters K are tubes for the admission of cold air to the chambers H, respectively.

Immediately in the rear of the chamber B, and adjoining the conical chamber E, I adjust the conical chamber L, which extends rearward to a point near the back end of the furnace. The extreme rear end of chamber L is left open to receive the air from the chamber M, next mentioned.

The letter M is an air-chamber" extending from the top of the furnace to the plate c, which said plate is on a level, or nearly so, with the grate-bars.

The letters O are tubes that convey cold air to the chamber M. next the fire is perforated, as shown, to admit ofthe passage therefrom of the partially-heated air into the air-space shown in the rear of chamber E, and from said air-space to the fire.

My device operates as follows: When the lire is built and the draft arising therefrom begins to move the latmosphere the cold air passes into the apertures D, passage G, and tubes K and 0, and as the several chambers connected with the said conduits become warm and hot the air in said chambers is drawn to the fire in a heated condition. rlhe resultisa thorough superheating of the air, a precipitation of the hydrogen and carbon into inhamniable gas, which passes off in the combustion, thereby not only preventing smoke, but. also adding materially to the heat of the lire.

What I claim as my invention, and desire to secure by Letters Patent, is-

A furnace having grate-bars C, with apertures D, passage G, tubes O and K, and cham bers B, H, L, and M, constructed, arranged,

'and operating substantially as specified.

Hosen H. HUNTLEY.

Witnesses L. E. EMMoNs, M. R. BUTZ.

The side ot' chamber M 

